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GEOREF RECORD

A hematite-bearing layer in Gale Crater, Mars; mapping and implications for past aqueous conditions

A. A. Fraeman, R. E. Arvidson, J. G. Catalano, J. P. Grotzinger, R. V. Morris, S. L. Murchie, K. M. Stack, D. C. Humm, J. A. McGovern, F. P. Seelos, K. D. Seelos and C. E. Viviano
A hematite-bearing layer in Gale Crater, Mars; mapping and implications for past aqueous conditions
Geology (Boulder) (July 2013) 41 (10): 1103-1106

Abstract

Oversampled Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) visible and near-infrared hyperspectral data over Mount Sharp in Gale Crater, Mars, were used to generate spatially sharpened maps of the location of red crystalline hematite within the uppermost stratum of an approximately 6.5-km-long ridge on the mound's northern flank. Finely layered strata underlie the ridge to the north and have dips consistent with the nearby Mount Sharp sedimentary sequence. Fe-Mg smectites are exposed in a valley to the south of the ridge. Emplacement of the hematite is hypothesized to result either from exposure of anoxic Fe (super 2+) -rich groundwater to an oxidizing environment, leading to precipitation of hematite or its precursors, or from in-place weathering of precursor silicate materials under oxidizing conditions. These hypotheses and implications for habitability will be testable with in situ measurements by the Mars rover Curiosity when it reaches Mount Sharp.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 41
Serial Issue: 10
Title: A hematite-bearing layer in Gale Crater, Mars; mapping and implications for past aqueous conditions
Affiliation: Washington University in St. Louis, Department of Earth and Planetary Sciences, Saint Louis, MO, United States
Pages: 1103-1106
Published: 20130730
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 20
Accession Number: 2013-069358
Categories: Extraterrestrial geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch map
Secondary Affiliation: California Institute of Technology, USA, United StatesNASA, USA, United StatesJohns Hopkins Applied Physics Laboratory, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2022, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201341
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